What is CVE-2026-42427?

CVE-2026-42427 is a medium-severity vulnerability in Openclaw, classified under Incomplete List of Disallowed Inputs. CVSS score: 5.3/10. Published 2026-04-28.

How severe is CVE-2026-42427?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Openclaw

CVE-2026-42427

OpenClaw before 2026.4.8 contains a remote code execution vulnerability caused by missing environment variable denylist entries for HGRCPATH, CARGO_BUILD_RUSTC_WRAPPER, RUSTC_WRAPPER, and MAKEFLAGS. Attackers can inject malicious build too…

EPSS: 0.000 (10.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N.

Affected products

Openclaw — versions 0, 2026.4.8

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

GitHub Security Advisory (GHSA-7437-7hg8-frrw) (vendor-advisory, Vendor Advisory)
Patch Commit (Patch, patch)
VulnCheck Advisory: OpenClaw < 2026.4.8 - Remote Code Execution via Build Tool Environment Variable Injection (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-42427?: CVE-2026-42427 is a medium-severity vulnerability in Openclaw, classified under Incomplete List of Disallowed Inputs. CVSS score: 5.3/10. Published 2026-04-28.
How severe is CVE-2026-42427?: Medium severity. CVSS v3 base score is 5.3 out of 10.